Frederick william tuerk



(No Model.)

P. W. TUERK, Jr. VENTILATING PAN.

No. 546,630. Patented Sept. 17, 1895.

INVENTCR I Wimessss; Frgderic/c'lf. TuerkJZ I BY . ATTORNEYS.

ANDREA} BIRANAM.PPIOTO-UTHQWASHINGTUNJL UNITED STATES PATENT OFFICE.

FREDERICK WILLIAM TUERK, JR.,OF FULTON, NEW YORK.

VENTILATING-FAN.

SPECIFICATION forming part of Letters Patent No. 546,630, datedSeptember 17, 1895.

-Appliatibn filed March 25, 1895. Serial No. 543,0s f. (No model.)

To all whom it may concern.-

Be it known that I, FREDERICK WILLIAM TUERK, Jr., of Fulton, in'the'county of Oswego, in the State of New York, have invented new anduseful Improvements in Ventilating- Fans, of which the following, takenin connection with the accompanying drawings, is a full, clear, andexact description.

This invention relates to ventilating-fans, and more particularly to themeans for ad: justing or changing the blades to any angle desired.

My object is to produce a changeable blade mechanism, by which I amenabled to enlarge or diminish the scope of the fan, easily and readilyoperated, cheap and durable in its construction, and of great utility;and to that end my invention consists in the several new and novelfeatures and combination of parts hereinafter described, and which arespecifically set forth in the claim hereunto annexed.

It is constructed as follows, reference being had to the accompanyingdrawings, in which Figure 1 shows an inner face view of the fan mountedready for operation. Fig. 2 is a sectional view of the means forchanging the angles of the blades. Fig. 3 is a view of the periphery ofthe gear-case. Fig. 4: is an' outer end view of the movable split clampand split collar.

A is the arbor, upon which is mounted an annular frame B, made in twoparts a I),

havin an interior annular recess a, and o enings 0 upon its periphery.Formed integrally with the frame B is the sleeve 2, which extends beyondthe center of the frame and forms not only a long bearing for the shaftA to prevent any possible vibration, but also forms a bearingfor theinner end ofthe shanks (1. Also formed integrally with the frame B isthe circular flange 3, which extends at right angles with the sleeve 2,and which catches against the outer side of the toothed slip-collar D,and holds it in gear with the pinions e. Thus constructed, the operatingparts are braced at every point, and a Very compact and strong frame isproduced.

. d are shanks mounted in the openings 0 and have the fan-blade Gsecured to the outer end and the conical cog e upon its inner endlocated within the annular recess a, as shown. Means are also providedfor securing the frame rigidly to the arbor A, as by a set-screw f, orby any other common and well-known means.

D isa slip-collar having a cog 9 upon its inner end adapted to mesh withthe cogs e. The slip-collar D may be split and provided with screws oran equivalent mechanism It for holding the collar and the cog upon itsinner end in position and in mesh with the cogs e. It will also beobserved that one half of the sleeve and cog e may be in one piece andthe other half of the sleeve separate.

When I desire to change the angle of the blades 0, I loosen the sleevesD upon the shaft, turn one of the fan-blades to the angle desired, andinasmuch as all of the blades are in gear with the cog g the remainingfanblades will move correspondingly in the same direction. I thentighten the sleeve D upon the shaft, so that all of the blades are heldat the same angle.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s-

In a ventilating fan, an annular frame,

formed of two parts and having the sleeve 2 and flange 3 formed integraltherewith, and

openings in its periphery, combined with shanks mounted in said openingsand having their inner ends bearing against the sleeve and provided withpinions, and their outer ends provided with fan blades 0; and thetoothed slip collar made in two parts and secured to the shaft,substantially as described. In witness whereof I have hereunto set myhand on this 15th day of October, 1894.

FREDERICK WILLIAM TUERK, JR. In presence of C. E. KRUPSLER,

WM. WEBER.

